CN102495077A - Automatic detecting method of machine vision system for detecting flaws of infusion bottle - Google Patents
Automatic detecting method of machine vision system for detecting flaws of infusion bottle Download PDFInfo
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- CN102495077A CN102495077A CN201110359069XA CN201110359069A CN102495077A CN 102495077 A CN102495077 A CN 102495077A CN 201110359069X A CN201110359069X A CN 201110359069XA CN 201110359069 A CN201110359069 A CN 201110359069A CN 102495077 A CN102495077 A CN 102495077A
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Abstract
The invention provides an automatic detecting method of a machine vision system for detecting flaws of an infusion bottle, wherein an image of a standard infusion bottle is pre-photographed and stored in a computer as the standard image of the infusion bottle, the fact whether an image is different from the standard image of the infusion bottle is set as a detecting parameter, a camera is started by an external trigger and control signal to photograph in real time images of the on-line moving infusion bottle, the photographed images are transmitted to the computer for detection, the images of the infusion bottle are extracted by the computer through image algorithmic process and compared with the standard image of the infusion bottle, so as to judge whether the products are qualified or waste, and the waste products are removed from a specified discharge opening through the external trigger and the control signal. The automatic detecting method of the machine vision system for detecting the flaws of the infusion bottle has high precision and speed in detecting the flaws of the infusion bottle, and can effectively ensure the qualification rate of the products.
Description
Technical field
The present invention relates to utilize NI Vision Builder for Automated Inspection to carry out the technical field of online detection, relate in particular in the infusion bottle production scene method of utilizing NI Vision Builder for Automated Inspection whether to exist flaws such as bubble, slight crack, calculus to detect automatically the infusion bottle body.
Background technology
Whether the infusion bottle workshop in line production is on-the-spot, need exist flaws such as bubble, slight crack, calculus to carry out online detection to the infusion bottle body.In the prior art; Online detection to infusion bottle body flaw relies on manual work to detect; Produce the machine side at infusion bottle and establish detection and the processing that about 80 people carry out the various flaws of infusion bottle, product is divided into certified products (indefectible) and unacceptable product (flaw is arranged) according to testing result.Unacceptable product is directly as goods rejection.
The shortcoming that manual detection exists mainly contains: the on-the-spot ventilation of workshop is poor, and workman's testing environment is abominable, and labour intensity is big; The normal eye promptly can dim eyesight, eye discomfort such as expand about uninterrupted observation moving object 30min, and testing staff's non-stop run for a long time can't guarantee the product export qualification rate; The flaw kind of infusion bottle is numerous, and the flaw that has is very tiny, and human eye can't judge accurately that error is big, and the chance of makeing mistakes is a lot, can't guarantee to detect quality; The speed of professional's infusion bottle body flaw is up to 0.5/s, and throughput rate is had very big restriction.
Summary of the invention
Online detection dependence manual work to infusion bottle body flaw detects to prior art, and the workman is easy to generate visual fatigue, and labour intensity is big; Can't guarantee product percent of pass and detect quality; Problems such as monitoring velocity is low, the present invention provides the automatic testing method of a kind of NI Vision Builder for Automated Inspection to infusion bottle body flaw, and it reduces workman's detection labour intensity greatly; Accuracy of detection is high, speed is fast, the qualification rate of the product that can effectively guarantee to dispatch from the factory.
Technical scheme of the present invention is following:
A kind of NI Vision Builder for Automated Inspection may further comprise the steps the automatic testing method of infusion bottle body flaw:
(1) infusion bottle is fixed on the frock bar anchor clamps, makes frock bar anchor clamps on-line operation, taking frock bar anchor clamps one side of camera fixing at on-line operation; According to the size of infusion bottle to be detected and infusion bottle towards, select the focal length of camera lens, shooting angle, shooting distance, aperture size, the time shutter of camera taken in adjustment, so that obtain photographic images clearly;
(2) start said industrial camera; Take the image of a standard infusion bottle body in advance; And the image of taking transferred to computing machine, computing machine is handled through image algorithm, extracts the image of infusion bottle body; This infusion bottle body image that obtains as infusion bottle body standard picture, is stored in the computing machine;
(3) will whether there are differences with infusion bottle body standard picture and be made as the detection parameter;
(4) computing machine is obtained camera and synchronous triggering and the control signal of production process, starts the image that said camera is taken on-line operation infusion bottle body in real time by external trigger and control signal, and the image of taking is transferred to computing machine confession detection;
(5) computing machine is handled through image algorithm, extracts the image of infusion bottle body;
(6) whether computing machine exists flaw to detect to said infusion bottle body; This detection is that said infusion bottle body image and infusion bottle body standard picture are compared, and detects in the infusion bottle body image whether have the figure that does not have in the infusion bottle body standard picture;
(7) judge that through image difference this product belongs to certified products or waste product, waste product is rejected from the discharging opening of appointment through external trigger and control signal.
Its further technical scheme is: to said (7) step, specifically carry out the judgement and the go-on-go of flaw by following step:
(8) judge whether to exist flaw, if do not exist flaw then to turn to for (9) step, if exist flaw then to turn to for (10) step;
(9) sort as certified products;
(10) directly as goods rejection.
And its further technical scheme is: to said (7) step, when detecting product and be waste product, computing machine will carry out picture cues through man-machine interface, and start warning device.
Useful technique effect of the present invention is:
Whether the present invention adopts NI Vision Builder for Automated Inspection to exist bubble, slight crack, calculus flaw to carry out automatic on-line to the infusion bottle body and detects, replace manual detection.Have the record, classification, statistics, storage, the query function that product are detected certified products, this two series products of waste product.And in image, point out the unacceptable product situation through friendly man-machine interface, and give sound, light alarm, reduce workman's detection labour intensity greatly.
Manual detection speed is generally 0.5/s, and the NI Vision Builder for Automated Inspection detection speed can reach 3 ~ 4/s, and the product detection speed of NI Vision Builder for Automated Inspection is artificial 6 ~ 8 times, has greatly improved production efficiency.
Manual detection can't uninterruptedly be carried out product quality in 24 hours and detect owing to environment and physiological reason, adopted NI Vision Builder for Automated Inspection to detect and then made it become possibility.The production time of equipment can prolong to greatest extent, has improved usage ratio of equipment.
The artificial detection because poor, the vision fatiguability that ventilates is difficult to the Continuous Tracking product quality.Detecting accuracy leans on artificial being difficult to guarantee that improper defect rate generally about 8 ~ 10%, has caused the significant wastage of the resources of production and production cost; The accuracy of detection of NI Vision Builder for Automated Inspection is higher, thereby improves product percent of pass greatly and detect quality.
Description of drawings
Fig. 1 is flawless infusion bottle body image.
Fig. 2 is the infusion bottle body image that has bubble.
Fig. 3 is the infusion bottle body image that has slight crack.
Fig. 4 is the infusion bottle body image that has calculus
Fig. 5 is a process sequence diagram of the present invention.
Embodiment
Further specify below in conjunction with the accompanying drawing specific embodiments of the invention.
What Fig. 1, Fig. 2, Fig. 3, Fig. 4 showed is from positive shooting of infusion bottle body and real image after treatment.
In Fig. 1, Fig. 2, Fig. 3, photographic images shown in Figure 4, blank parts is the transparent space of infusion bottle body image after through the denoising software processes all around, shown in the solid line bar be the contour images of infusion bottle body after handling.
Embodiment 1, body existed the detection of the infusion bottle product of bubble:
Infusion bottle body image as shown in Figure 2, there is bubble in its upper left corner.
Basler ACA640-100GM type industrial camera is fixed on the dead ahead of infusion bottle, and camera is about 100mm apart from the distance of infusion bottle side, uses to execute and bears zoom lens, and focal length transfers to 8mm, and aperture is transferred to maximal value, and the time shutter is adjusted to 0.41ms.Adopt special-purpose White LED bowl light source, shine (backlight), and use and semiclosedly block the influence that the metal framework shields extraneous veiling glare,, embody the obvious characteristic of infusion bottle so that obtain visual pattern more stablely from the heteropleural side of the relative infusion bottle of camera.The LED bowl light source of this project uses the machine vision special light source (also can use the LED bowl light source of other companies) of CCS company, so that can photograph distinct image more stablely, and is shown in the screen of computing machine.Adopt the frock bar anchor clamps on the production line that infusion bottle is fixed, make each infusion bottle unification towards.Carry out the conveying of infusion bottle through belt transmission system, guarantee that infusion bottle by certain direction and speed, stably gets into pick-up unit.
Start said industrial camera; Take the image of a flawless standard infusion bottle body in advance; And the image of taking transferred to computing machine, computing machine is handled through image algorithm, extracts the image of infusion bottle body; This infusion bottle body image that obtains as infusion bottle body standard picture (like Fig. 1), is stored in the computing machine.
Computing machine is according to the different control system of institute of different production firm production equipment; Obtain synchronous triggering of camera and production process and control signal; Start said industrial camera and take the image of the infusion bottle body of on-line operation, and, be stored in the computing machine the infusion bottle body image that obtains.
Computing machine carries out Flame Image Process to captured image through edge extracting, smoothing denoising, binary conversion treatment, Fourier Tranform scheduling algorithm, makes image more clear, more meets the truth of infusion bottle.The algorithm that is adopted in the above-mentioned image processing process is conventional algorithm of the prior art.
Computing machine compares said infusion bottle body image and infusion bottle body standard picture; Detect and have non-existent figure A in the infusion bottle body standard picture in this infusion bottle body image, this figure A is the figure that bubble produces, and then this product is a unacceptable product; Computing machine is pointed out the unacceptable product situation through friendly man-machine interface in image, and gives sound, light alarm, and such unacceptable product is write down, classifies, adds up warehouse-in.
Embodiment 2, body existed the detection of the infusion bottle product of slight crack:
Infusion bottle body image as shown in Figure 3, there is slight crack in the center.
Basler ACA640-100GM type industrial camera is fixed on the dead ahead of infusion bottle, and camera is about 100mm apart from the distance of infusion bottle side, uses to execute and bears zoom lens, and focal length transfers to 8mm, and aperture is transferred to maximal value, and the time shutter is adjusted to 0.41ms.Adopt special-purpose White LED bowl light source, shine (backlight), and use and semiclosedly block the influence that the metal framework shields extraneous veiling glare,, embody the obvious characteristic of infusion bottle so that obtain visual pattern more stablely from the heteropleural side of the relative infusion bottle of camera.The LED bowl light source of this project uses the machine vision special light source (also can use the LED bowl light source of other companies) of CCS company, so that can photograph distinct image more stablely, and is shown in the screen of computing machine.Adopt the frock bar anchor clamps on the production line that infusion bottle is fixed, make each infusion bottle unification towards.Carry out the conveying of infusion bottle through belt transmission system, guarantee that infusion bottle by certain direction and speed, stably gets into pick-up unit.
Start said industrial camera; Take the image of a flawless standard infusion bottle body in advance; And the image of taking transferred to computing machine, computing machine is handled through image algorithm, extracts the image of infusion bottle body; This infusion bottle body image that obtains as infusion bottle body standard picture (like Fig. 1), is stored in the computing machine.
Computing machine is according to the different control system of institute of different production firm production equipment; Obtain synchronous triggering of camera and production process and control signal; Start said industrial camera and take the image of the infusion bottle body of on-line operation, and, be stored in the computing machine the infusion bottle body image that obtains.
Computing machine carries out Flame Image Process to captured image through edge extracting, smoothing denoising, binary conversion treatment, Fourier Tranform scheduling algorithm, makes image more clear, more meets the truth of infusion bottle.The algorithm that is adopted in the above-mentioned image processing process is conventional algorithm of the prior art.
Computing machine compares said infusion bottle body image and infusion bottle body standard picture; Detect and have non-existent figure B in the infusion bottle body standard picture in this infusion bottle body image, this figure B is the figure that slight crack produces, and then this product is a unacceptable product; Computing machine is pointed out the unacceptable product situation through friendly man-machine interface in image, and gives sound, light alarm, and such unacceptable product is write down, classifies, adds up warehouse-in.
Embodiment 3, body existed the detection of the infusion bottle product of calculus:
Infusion bottle body image as shown in Figure 4, there is calculus in its lower right corner.
Basler ACA640-100GM type industrial camera is fixed on the dead ahead of infusion bottle, and camera is about 100mm apart from the distance of infusion bottle side, uses to execute and bears zoom lens, and focal length transfers to 8mm, and aperture is transferred to maximal value, and the time shutter is adjusted to 0.41ms.Adopt special-purpose White LED bowl light source, shine (backlight), and use and semiclosedly block the influence that the metal framework shields extraneous veiling glare,, embody the obvious characteristic of infusion bottle so that obtain visual pattern more stablely from the heteropleural side of the relative infusion bottle of camera.The LED bowl light source of this project uses the machine vision special light source (also can use the LED bowl light source of other companies) of CCS company, so that can photograph distinct image more stablely, and is shown in the screen of computing machine.Adopt the frock bar anchor clamps on the production line that infusion bottle is fixed, make each infusion bottle unification towards.Carry out the conveying of infusion bottle through belt transmission system, guarantee that infusion bottle by certain direction and speed, stably gets into pick-up unit.
Start said industrial camera; Take the image of a flawless standard infusion bottle body in advance; And the image of taking transferred to computing machine, computing machine is handled through image algorithm, extracts the image of infusion bottle body; This infusion bottle body image that obtains as infusion bottle body standard picture (like Fig. 1), is stored in the computing machine.
Computing machine is according to the different control system of institute of different production firm production equipment; Obtain synchronous triggering of camera and production process and control signal; Start said industrial camera and take the image of the infusion bottle body of on-line operation, and, be stored in the computing machine the infusion bottle body image that obtains.
Computing machine carries out Flame Image Process to captured image through edge extracting, smoothing denoising, binary conversion treatment, Fourier Tranform scheduling algorithm, makes image more clear, more meets the truth of infusion bottle.The algorithm that is adopted in the above-mentioned image processing process is conventional algorithm of the prior art.
Computing machine compares said infusion bottle body image and infusion bottle body standard picture; Detect and have non-existent figure C in the infusion bottle body standard picture in this infusion bottle body image, this figure C is the figure that calculus produces, and then this product is a unacceptable product; Computing machine is pointed out the unacceptable product situation through friendly man-machine interface in image, and gives sound, light alarm, and such unacceptable product is write down, classifies, adds up warehouse-in.
More than the control system (hardware and software) of the image capture device (camera, radiation source, power supply, image pick-up card etc.) that uses among all embodiment and storage device (hard disk, CD, floppy disk etc.), image processing equipment (hardware of image processor and software), image display (hardware and software), warning device and each part mentioned above all adopt prior art to design and produce or directly adopt relevant commercially available prod.
Above-described processing step of the present invention is shown in Fig. 5.
It should be noted that above-described at last only is preferred implementation of the present invention, the invention is not restricted to above embodiment.Be appreciated that other improvement and variation that those skilled in the art directly derive or associate under the prerequisite that does not break away from spirit of the present invention and design, all should think to be included within protection scope of the present invention.
Claims (3)
1. a NI Vision Builder for Automated Inspection is characterized in that may further comprise the steps to the automatic testing method of infusion bottle body flaw:
(1) infusion bottle is fixed on the frock bar anchor clamps, makes frock bar anchor clamps on-line operation, taking frock bar anchor clamps one side of camera fixing at on-line operation; According to the size of infusion bottle to be detected and infusion bottle towards, select the focal length of camera lens, shooting angle, shooting distance, aperture size, the time shutter of camera taken in adjustment, so that obtain photographic images clearly;
(2) start said industrial camera; Take the image of a standard infusion bottle body in advance; And the image of taking transferred to computing machine, computing machine is handled through image algorithm, extracts the image of infusion bottle body; This infusion bottle body image that obtains as infusion bottle body standard picture, is stored in the computing machine;
(3) will whether there are differences with infusion bottle body standard picture and be made as the detection parameter;
(4) computing machine is obtained camera and synchronous triggering and the control signal of production process, starts the image that said camera is taken on-line operation infusion bottle body in real time by external trigger and control signal, and the image of taking is transferred to computing machine confession detection;
(5) computing machine is handled through image algorithm, extracts the image of infusion bottle body;
(6) whether computing machine exists flaw to detect to said infusion bottle body; This detection is that said infusion bottle body image and infusion bottle body standard picture are compared, and detects in the infusion bottle body image whether have the figure that does not have in the infusion bottle body standard picture;
(7) judge that through image difference this product belongs to certified products or waste product, waste product is rejected from the discharging opening of appointment through external trigger and control signal.
2. according to the automatic testing method of the said NI Vision Builder for Automated Inspection of claim 1, it is characterized in that said (7) step is specifically carried out the judgement and the go-on-go of flaw by following step to infusion bottle body flaw:
(8) judge whether to exist flaw, if do not exist flaw then to turn to for (9) step, if exist flaw then to turn to for (10) step;
(9) sort as certified products;
(10) directly as goods rejection.
3. according to the automatic testing method of the said NI Vision Builder for Automated Inspection of claim 1, it is characterized in that to said (7) step when detecting product and be waste product, computing machine will carry out picture cues through man-machine interface, and start warning device to infusion bottle body flaw.
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| CN103698337A (en) * | 2013-12-19 | 2014-04-02 | 三峡大学 | Method for automatically detecting adhesion defect of label of flat wine bottle |
| CN105270688A (en) * | 2015-03-06 | 2016-01-27 | 南通恒力医药设备有限公司 | Electronic tablet counting machine based on visual monitoring |
| CN107030021A (en) * | 2017-04-11 | 2017-08-11 | 浙江农林大学暨阳学院 | A kind of vision-based detection localization method for potato chips production line |
| CN113129673A (en) * | 2021-03-24 | 2021-07-16 | 广东三向智能科技股份有限公司 | Intelligent sensor technology application training equipment |
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| CN113129673A (en) * | 2021-03-24 | 2021-07-16 | 广东三向智能科技股份有限公司 | Intelligent sensor technology application training equipment |
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Application publication date: 20120613 |